Writing for the "Time 100" list of the most influential people, Hillary Clinton tacitly recognized the looming shadow of Elizabeth Warren by praising the Massachusetts senator for never hesitating to hold the feet of powerful people, even "presidential aspirants," to the fire.

"Elizabeth Warren never lets us forget that the work of taming Wall Street's irresponsible risk-taking and reforming our financial system is far from finished. And she never hesitates to hold powerful people's feet to the fire: bankers, lobbyists, senior government officials and, yes, even presidential aspirants," the newly announced presidential candidate said of Warren, whom she says has picked up the mantle of the late Ted Kennedy, a legend among liberals and Warren's predecessor in the Senate.

It is not the first time Clinton has publicly praised Warren. At a campaign event that both attended in New Hampshire last year, she called the first-term senator "a passionate champion for working people," but Warren did not reciprocate with similar compliments, according to Boston.com.

And during a recent "CBS This Morning" interview conducted before Clinton launched her campaign, Warren was pressed multiple times, but declined to say whether the former secretary of state represents the future of the Democratic Party.

"I think we have to see, first of all, if she declares and what she says she wants to run on," Warren said. "I think that's really the interesting question at this point."

Clinton's recent embrace of progressive policies and anti-Wall Street rhetoric may not be enough to satiate liberals in the Democratic Party, who are still yearning for someone to challenge the former secretary of state.

"There's a general uncertainty of where she stands on key economic issues. A lot of people would prefer to have someone who is a real populist crusader, who is clear about what she would do," Roger Hickey of the liberal advocacy group Campaign for America's Future, tells The Wall Street Journal.

"Those pining for a Warren candidacy are not going gently into the night, with Ready for Warren and Act.tv launching a video Thursday with numerous Warren supporters pleading for her to run for president. Last week, liberal pundit Bill Maher flat-out tried to bribe Warren to run for president, saying he would give her $1 million if she ran," reports the National Journal.

"But after falling for Barack Obama's false mantra of 'hope and change,' Democrats and American voters in general are not likely to listen to the siren song of a born-again middle-class 'champion' without some hard proof," writes Darrell Delamaide, a political columnist for MarketWatch.

"Unless Clinton explains how she will unstack that deck with specific proposals to raise taxes on the wealthy, close corporate tax loopholes," he writes, "no one will really believe she is on board with a progressive agenda."

Writing for the "Time 100" list of the most influential people, Hillary Clinton praised the work of Elizabeth Warren, but Clinton's recent embrace of progressive policies and anti-Wall Street rhetoric may not be enough to satiate liberals in the Democratic Party.